Formation of three-vertex metallaboranes from monoborane precursors: X-ray crystal structures of the molybdenum and ruthenium complexes [Mo(η-C₅H₅)₂H(η²-B₂H₅)] and [Ru(η-C₅Me₅)(PMe₃)(η²-B₂H₇)]

Reactions of small boranes with ruthenium phosphine hydrides: Oligomerisation of monoborane-tetrahydrofuran to a nido-hexaruthenaborane

“…Compound (1) has been characterised by 1 H, 11 B and 31 P NMR spectroscopy and is assigned the structure nido-2-[Ru(PPh 3 ) 2 (H)B 5 H 10 ] (1) (Fig. 1).…”

“…Previously we have reported the synthesis of [Mo(g-C 5 H 5 ) 2 (H)B 2 H 5 ], [arachno-2-Mo(g-C 5 H 5 )(g 5 :g 1 -C 5 H 4 )B 4 H 7 ] and [closo-1-Mo(g-C 5 H 5 )(g 2 :g 3 -C 3 H 3 )C 2 B 3 -H 5 ] from [Mo(g-C 5 H 5 ) 2 H 2 ] and BH 3 AE thf as well as the synthesis of [arachno-2-W(PMe 3 ) 3 [1][2][3]. In the last 12-13 years Fehlner and co-workers have used the reagent BH 3 AE thf to systematically produce a range of metallaboranes, often in good yields, using mainly cyclopentadienyl metal chlorides as precursors [4].…”

A new entry into ferraborane chemistry: Synthesis and characterization of heteroferraborane complexes

“…The 11 B NMR spectrum reveals one equivalent of boron environment associated with one terminal hydrogen and one bridging hydrogen at d = À25.1 ppm. The chemical shift and multiplicity of 11 B NMR resonance is characteristic of those observed for metal-B 3 H 8 complexes [22] and [CpÃRu(PMe 3 )(g 2 -B 2 H 7 )] [23]. Besides the Cp protons, 1 H NMR spectrum reveals four protons associated with boron cage with a ratio of 1:1.…”

“…The composition and structure of 2 is established in comparison of the spectroscopic data with arachno-[CpÃFe(CO)B 3 H 8 ] [15] and related species [22][23][24][25]. The composition of 2 is defined by the mass, an isotopic distribution pattern characteristic of one Fe, two B and one Se atom.…”

Partial incorporation of a cyclopentadienyl ligand into a molybdaborane to form a molybdacarbaborane

“…We have been interested in exploring the formation and chemistry of metallaboranes of the early to middle transition metals [14][15][16][17][18]. In particular, we have been able to synthesise the molybdaborane arachno-2-[Mo(g-C 5 H 5 )(g 5 :g 1 -C 5 H 4 )B 4 H 7 ] (I) in gram quantities and this has permitted a study of its chemistry [19].…”